Move bignum from dist/ to cpan/

[perl5.git] / cpan / bignum / lib / Math / BigFloat / Trace.pm

diff --git a/cpan/bignum/lib/Math/BigFloat/Trace.pm b/cpan/bignum/lib/Math/BigFloat/Trace.pm
new file mode 100644 (file)
index 0000000..6eee9fa
--- /dev/null
+++ b/cpan/bignum/lib/Math/BigFloat/Trace.pm
@@ -0,0 +1,57 @@
+#!/usr/bin/perl -w
+
+package Math::BigFloat::Trace;
+
+require 5.005_02;
+use strict;
+
+use Exporter;
+use Math::BigFloat;
+use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK
+            $accuracy $precision $round_mode $div_scale);
+
+@ISA = qw(Exporter Math::BigFloat);
+
+$VERSION = '0.40';
+
+use overload;                   # inherit overload from BigFloat
+
+# Globals
+$accuracy = $precision = undef;
+$round_mode = 'even';
+$div_scale = 40;
+
+sub new {
+    my $proto = shift;
+    my $class = ref($proto) || $proto;
+
+    my $value = shift;
+    my $a = $accuracy;
+    $a = $_[0] if defined $_[0];
+    my $p = $precision;
+    $p = $_[1] if defined $_[1];
+    my $self = Math::BigFloat->new($value, $a, $p, $round_mode);
+
+    # remember, downgrading may return a BigInt, so don't meddle with class
+    # bless $self, $class;
+
+    print "MBF new '$value' => '$self' (", ref($self), ")";
+    return $self;
+}
+
+sub import {
+    print "MBF import ", join(' ', @_);
+    my $self = shift;
+
+    # we catch the constants, the rest goes go BigFloat
+    my @a = ();
+    foreach (@_) {
+        push @a, $_ if $_ ne ':constant';
+    }
+    overload::constant float => sub { $self->new(shift); };
+
+    Math::BigFloat->import(@a);                 # need it for subclasses
+#    $self->export_to_level(1,$self,@_);         # need this ?
+}
+
+1;